A torsion spring structure for noise reduction during compressor start-stop.

Abstract

The present invention discloses a torsion spring structure for reducing noise when starting and stopping a compressor, comprising a limit bracket and a torsion spring, wherein the limit bracket comprises a first connection part and a first bending part connected to both ends of the first connection part and bent toward the stator seat of the motor, the first bending part is provided with a groove, and the first connection part is fixed to the inner wall of the shell of the compressor; the torsion spring comprises a second connection part and a fixing part connected to both ends of the second connection part; the torsion spring is fixed to the stator seat of the motor through the fixing parts at both ends, and the second connection part spans the top of the stator seat of the motor along the diagonal; the second connection part comprises a semicircular second bending part and a straight part located at both ends of the second bending part; the two straight parts are respectively tightly embedded in the two grooves. This patent utilizes the limiting effect between the torsion spring and the limit bracket to play a buffering and fixing role on the motor movement when the compressor is started and stopped, so as to prevent the movement from shaking and colliding with the shell, thereby reducing noise.

Description

Technical Field

[0001] The invention belongs to the technical field of compressors, and in particular to a torsion spring structure used for starting and stopping noise reduction of compressors. Background Art

[0002] The refrigerator compressor will start and stop during normal operation, but at the moment of starting and stopping, the compressor will usually shake or hit. This shaking or hitting is because when the compressor quickly switches from a static state to a high-speed operation state when it is powered on, or when it switches from a high-speed operation state to a static state when the power is off, the rotation of the compressor movement will generate a large inertial force, which will cause the compressor movement to shake greatly or the movement to hit the casing. In particular, the variable frequency compressor has a larger instantaneous current at startup than the general fixed frequency compressor, which is more likely to shake and hit.

[0003] In the existing compressor technology, for example, the piston compressor anti-collision limit device provided by CN210317671U includes a limit column and a limit ring. The limit column is set on the crankshaft of the transmission component, and the limit ring is set on the inner wall of the top cover. The limit ring can make at least a part of the limit column extend into the limit ring when the top cover is closed on the compressor housing, and a certain gap is reserved between the limit circle and the inner side wall of the limit circle, so as to allow the limit column to always rotate in the limit circle when the compressor pump body is in operation. The gap spacing is smaller than the minimum installation spacing between the outer contour of the compressor pump body and the inner wall of the compressor housing. The limit ring is provided with a spring fixed on the inner wall of the limit ring and distributed along the inner wall circumferentially, and a limit block fixed at the end of each spring. The limit ring, spring, limit block and other structures are used to limit the movement range between the compressor housing and the compressor pump body, avoid collision between the compressor pump body and the housing, reduce the noise when the compressor is working, and avoid damage caused by collision between the compressor housing and the pump body. However, this device has many parts, a complex structure, is prone to failure, and is inconvenient to repair and replace. Summary of the invention

[0004] In order to solve the above-mentioned problems of the prior art, the present invention provides a torsion spring structure for compressor start-stop noise reduction, which is achieved through the following technical solution.

[0005] A torsion spring structure for reducing noise during start-stop of a compressor comprises a limit bracket and a torsion spring, wherein the limit bracket comprises a first connecting portion and a first bent portion connected to both ends of the first connecting portion and bent toward a stator seat of a motor, wherein the first bent portion is provided with a groove, and the first connecting portion is fixed to an inner wall of a shell of the compressor; the torsion spring comprises a second connecting portion and a fixing portion connected to both ends of the second connecting portion; the torsion spring is fixed to the stator seat of the motor through the fixing portions at both ends, and the second connecting portion spans diagonally over the stator seat of the motor; the second connecting portion comprises a semicircular second bent portion and straight portions located at both ends of the second bent portion, a gap being left between the second connecting portion and the shell, stator seat and rotor of the compressor; and the two straight portions are respectively tightly embedded in the two grooves.

[0006] When the motor of an existing compressor is started or shut down, the movement of the motor is prone to shaking and colliding with the housing due to the rotational inertia in the rotation direction. The above-mentioned torsion spring structure of this patent fixes the first connection part of the limit bracket on the inner wall of the compressor housing, and the first bending parts at both ends of the first connection part are bent toward the stator seat of the compressor motor. The two straight parts of the torsion spring are respectively embedded in the grooves on the first bending parts, so that there is no relative rotation between the torsion spring and the limit bracket. Except for the fixed part, the other parts of the torsion spring do not contact the stator seat, stator, rotor and compressor housing of the motor, avoiding interference and noise. The torsion spring of this patent is fixed to the stator seat through the fixed part according to the diagonal direction of the stator seat. At the same time, the torsion spring is also limited by the groove of the limit bracket, thereby avoiding the shaking of the stator seat of the movement relative to the housing and colliding with the housing, significantly reducing the torsion spring structure during the start and stop process of the compressor. The second bending part in the middle of the torsion spring is used to avoid the oil suction pipe in the center of the rotor of the model to avoid contact with the oil suction pipe and wear. The torsion spring can be made of steel wire with a certain elastic deformation capacity to play a certain buffering role.

[0007] Preferably, the fixing portion includes a third bending portion bent toward the stator seat of the motor, a fourth bending portion is provided at the end of the third bending portion, a fixing ring is provided at the end of the fourth bending portion, and the plane where the fixing ring is located is parallel to the surface of the stator seat of the motor.

[0008] More preferably, a torsion spring support block is provided on the stator seat of the motor, and the fixing ring is interference-sleeved on the torsion spring support block.

[0009] More preferably, a bolt hole is provided on the stator seat of the motor, and the fixing ring is pressed on the bolt hole by a bolt. The fixing ring is aligned with the bolt hole, and then the bolt is screwed in to press the fixing ring on the bolt hole, thereby achieving a fixed connection between the torsion spring and the stator seat.

[0010] Preferably, the first connecting portion is welded and fixed to the inner wall of the compressor casing.

[0011] Preferably, the first connection portion is fixed to the inner wall of the compressor housing by bolts. In order to improve the convenience of maintenance and replacement, the first connection portion of the limit bracket is fixed to the housing by bolts, and the bolts can be removed when disassembly is required.

[0012] Preferably, the cross-sectional diameter of the torsion spring is 1.4 mm-2.0 mm, and the width of the groove on the first bending portion is 3 mm-4 mm.

[0013] Compared with the prior art, the beneficial effects of the present invention are: by utilizing the limiting effect between the torsion spring and the limiting bracket, the movement of the motor is buffered and fixed when the compressor is started and stopped, thereby preventing the movement from colliding with the compressor casing due to rotational inertia shaking, and reducing noise during starting and stopping. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of the torsion spring structure for compressor start-stop noise reduction according to Example 1;

[0015] Figure 2 A top view of a torsion spring structure for compressor start-stop noise reduction according to Example 1 (the stator seat, stator and rotor are not shown);

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the limit bracket of the torsion spring structure for compressor start-stop noise reduction according to Example 1;

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the torsion spring of the torsion spring structure for reducing noise when starting and stopping the compressor according to Example 1;

[0018] Figure 5 A front view of a torsion spring structure for compressor start-stop noise reduction according to embodiment 2;

[0019] In the figure: 1. limit bracket; 2. torsion spring; 3. first connecting part; 4. stator seat; 5. first bending part; 6. groove; 7. shell; 8. second connecting part; 9. second bending part; 10. straight part; 11. rotor; 12. third bending part; 13. fourth bending part; 14. fixing ring; 15. torsion spring support block; 16. bolt hole. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions of each embodiment of this patent in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of this patent, not all of them. Based on the embodiments of this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0021] In the description of this patent, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of this patent. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. It should be pointed out that all the drawings are exemplary representations. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0023] The present invention is further described in detail below through specific implementation examples and in conjunction with the accompanying drawings.

[0024] Example 1

[0025] like Figure 1-4 As shown, the torsion spring structure for compressor start-stop noise reduction provided in this embodiment includes a limit bracket 1 and a torsion spring 2, wherein the limit bracket 1 includes a first connecting portion 3 and a first bending portion 5 connected to both ends of the first connecting portion 3 and bent toward the stator seat 4 of the motor, and the first bending portion 5 is provided with a groove 6, and the first connecting portion 3 is welded and fixed to the inner wall of the shell 7 of the compressor; the torsion spring 2 includes a second connecting portion 8 and a fixing portion connected to both ends of the second connecting portion 8; the torsion spring 2 is fixed to the stator seat 4 of the motor through the fixing portions at both ends, and the second connecting portion 8 spans diagonally above the stator seat 4 of the motor; the second connecting portion 8 includes a semi-circular groove 6; the semi-circular groove 6 is provided on the first bending portion 5 ... A circular second bending portion 9 and straight portions 10 located at both ends of the second bending portion 9, a gap is left between the second connecting portion 8 and the compressor housing 7, stator seat 4, and rotor 11; the two straight portions 10 are tightly embedded in the two grooves 6 respectively; the fixing portion includes a third bending portion 12 bent toward the stator seat 4 of the motor, a fourth bending portion 13 is provided at the end of the third bending portion 12, a fixing ring 14 is provided at the end of the fourth bending portion 13, the plane where the fixing ring 14 is located is parallel to the surface of the stator seat 4 of the motor, a torsion spring support block 15 is provided on the stator seat 4 of the motor, and the fixing ring 14 is interference fit on the torsion spring support block 15.

[0026] like Figure 1 As shown, the direction of the movement currently on the market is vertically downward and fixed in the compressor housing. The above-mentioned torsion spring structure provided in this embodiment fixes the first connection part of the limit bracket on the inner wall of the compressor housing, and the first bending parts at both ends of the first connection part are bent upward toward the stator seat of the compressor motor. The two straight parts of the torsion spring are respectively embedded in the grooves on the first bending parts, so that there is no relative rotation between the torsion spring and the limit bracket. Except for the fixed part, the other parts of the torsion spring do not contact the stator seat, stator, rotor and compressor housing of the motor, avoiding interference contact and noise. The torsion spring of this patent is fixed on the stator seat through the fixed part according to the diagonal direction of the stator seat. At the same time, the torsion spring is also limited by the groove of the limit bracket, thereby avoiding the shaking of the stator seat of the movement relative to the housing and the collision of the housing, which significantly reduces the torsion spring structure during the start and stop of the compressor. The second bend in the middle of the torsion spring is used to avoid the oil suction pipe in the center of the rotor to avoid contact with the oil suction pipe and wear; the third bend is also bent upward toward the stator seat of the compressor motor to facilitate the connection between the straight part of the torsion spring and the groove of the limit bracket; the fourth bend is bent in the horizontal direction to facilitate the connection between the fixing ring and the torsion spring support block. The torsion spring can be made of steel wire with a certain elastic deformation capacity to play a certain buffering role.

[0027] Example 2

[0028] like Figure 5 As shown, the torsion spring structure for compressor start-stop noise reduction provided in this embodiment is different from that in Embodiment 1 in that: a bolt hole 16 is provided on the stator seat 4 of the motor, and the fixing ring 14 is pressed on the bolt hole 16 by bolts; the first connecting part 3 is fixed to the inner wall of the compressor casing 7 by bolts.

[0029] In this embodiment, the first connecting part is fixed to the housing with bolts, which is convenient for replacement and maintenance.

[0030] The above embodiments describe the implementation of the present invention in detail, but the present invention is not limited to the specific details in the above embodiments. Within the scope of the claims and technical concept of the present invention, the technical solution of the present invention can be modified and changed in many simple ways, and these simple modifications all belong to the protection scope of the present invention.

Claims

1. A torsion spring structure for reducing noise during compressor start-stop, characterized in that: The invention comprises a limit bracket and a torsion spring, wherein the limit bracket comprises a first connecting portion and a first bending portion connected to both ends of the first connecting portion and bent toward the stator seat of the motor, the first bending portion is provided with a groove, and the first connecting portion is fixed to the inner wall of the shell of the compressor; the torsion spring comprises a second connecting portion and a fixing portion connected to both ends of the second connecting portion; the torsion spring is fixed to the stator seat of the motor through the fixing portions at both ends, and the second connecting portion spans above the stator seat of the motor along the diagonal of the stator seat; the second connecting portion comprises a semicircular second bending portion and a straight portion located at both ends of the second bending portion, and a gap is left between the second connecting portion and the shell, stator seat and rotor of the compressor; the two straight portions are tightly embedded in the two grooves respectively; the fixing portion comprises a third bending portion bent toward the stator seat of the motor, the end of the third bending portion is provided with a fourth bending portion, the end of the fourth bending portion is provided with a fixing ring, and the plane where the fixing ring is located is parallel to the surface of the stator seat of the motor; The stator seat of the motor is provided with a torsion spring support block, and the fixing ring is interference-sleeved on the torsion spring support block; the stator seat of the motor is provided with a bolt hole, and the fixing ring is pressed on the bolt hole by bolts.

2. The torsion spring structure for compressor start-stop noise reduction according to claim 1 is characterized in that: The first connecting portion is welded and fixed on the inner wall of the compressor shell.

3. The torsion spring structure for compressor start-stop noise reduction according to claim 1 is characterized in that: The first connecting portion is fixed to the inner wall of the compressor casing by means of bolts.

4. The torsion spring structure for compressor start-stop noise reduction according to claim 1, characterized in that: The cross-sectional diameter of the torsion spring is 1.4 mm-2.0 mm, and the width of the groove on the first bending portion is 3 mm-4 mm.

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